Lattice QCD Calculations of Transverse-Momentum-Dependent Soft Function through Large-Momentum Effective Theory

Zhang, Qi-An and Hua, Jun and Huo, Yikai and Ji, Xiangdong and Liu, Yizhuang and Liu, Yu-Sheng and Schlemmer, Maximilian and Schafer, Andreas and Sun, Peng and Wang, Wei and Yang, Yi-Bo (2020) Lattice QCD Calculations of Transverse-Momentum-Dependent Soft Function through Large-Momentum Effective Theory. PHYSICAL REVIEW LETTERS, 125 (19): 192001. ISSN 0031-9007, 1079-7114

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Abstract

The transverse-momentum-dependent (TMD) soft function is a key ingredient in QCD factorization of Drell-Yan and other processes with relatively small transverse momentum. We present a lattice QCD study of this function at moderately large rapidity on a 2 + 1 flavor CLS dynamic ensemble with a = 0.098 fm. We extract the rapidity-independent (or intrinsic) part of the soft function through a large-momentum-transfer pseudoscalar meson form factor and its quasi-TMD wave function using leading-order factorization in large-momentum effective theory. We also investigate the rapidity-dependent part of the soft function-the Collins-Soper evolution kernel-based on the large-momentum evolution of the quasi-TMD wave function.

Item Type: Article
Uncontrolled Keywords: GROUND-STATE PROPERTIES; NUCLEAR; CLUSTERS; DYNAMICS; MODEL;
Subjects: 500 Science > 530 Physics
Divisions: Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer
Depositing User: Dr. Gernot Deinzer
Date Deposited: 08 Mar 2021 09:53
Last Modified: 08 Mar 2021 09:53
URI: https://pred.uni-regensburg.de/id/eprint/43415

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